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Business Segments, Consolidated Revenues and Expenses (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Consolidated Revenues [Abstract] |  |  |  |
Total consolidated revenues | $ 12,909.9 |  | $ 11,383.1 |
Operating costs and expenses: |  |  |  |
Cost of sales | 11,052.7 | [1] | 9,692.5 | [1]
Other operating costs and expenses | 607.2 | [2] | 504.0 | [2]
Depreciation, amortization and accretion | 301.4 |  | 276.8 |
Net gains attributable to asset sales and insurance recoveries | (89.6) |  | (63.9) |
Non-cash asset impairment charges | 8.8 |  | 11.0 |
General and administrative costs | 53.2 |  | 49.5 |
Total consolidated costs and expenses | 11,933.7 |  | 10,469.9 |
NGL Pipelines and Services [Member] |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |
Sales of NGLs and related products | 4,795.8 |  | 3,665.6 |
Midstream services | 383.7 |  | 285.4 |
Total consolidated revenues | 5,179.5 |  | 3,951.0 |
Operating costs and expenses: |  |  |  |
Non-cash asset impairment charges | 2.6 |  | 1.0 |
Onshore Natural Gas Pipelines and Services [Member] |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |
Sales of natural gas | 953.2 |  | 639.5 |
Midstream services | 251.4 |  | 238.2 |
Total consolidated revenues | 1,204.6 |  | 877.7 |
Operating costs and expenses: |  |  |  |
Non-cash asset impairment charges | 0.2 |  | 0 |
Onshore Crude Oil Pipelines and Services [Member] |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |
Sales of crude oil | 4,873.4 |  | 4,742.8 |
Midstream services | 84.9 |  | 50.4 |
Total consolidated revenues | 4,958.3 |  | 4,793.2 |
Operating costs and expenses: |  |  |  |
Non-cash asset impairment charges | 1.0 |  | 0 |
Offshore Pipelines And Services [Member] |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |
Sales of natural gas | 0.2 |  | 0.1 |
Sales of crude oil | 2.1 |  | 2.3 |
Midstream services | 34.6 |  | 40.2 |
Total consolidated revenues | 36.9 |  | 42.6 |
Petrochemical and Refined Products Services [Member] |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |
Sales of petrochemicals and refined products | 1,356.2 |  | 1,547.2 |
Midstream services | 174.4 |  | 171.4 |
Total consolidated revenues | 1,530.6 |  | 1,718.6 |
Operating costs and expenses: |  |  |  |
Non-cash asset impairment charges | $ 5.0 |  | $ 10.0 |
[1] | Cost of sales is a component of "Operating costs and expenses," as presented on our Unaudited Condensed Statements of Consolidated Operations. Quarter-to-quarter fluctuations in these amounts are primarily due to changes in energy commodity prices and sales volumes associated with our marketing activities.
[2] | Represents cost of operating our plants, pipelines and other fixed assets, excluding depreciation, amortization and accretion charges.

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- Definition The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss) recorded in operating costs and expenses. + References No definition available. + Details
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